LG 55G2 Service Manual page 88

Standard Repair Process
LCD TV
☞ A6
Check RF Signal level
Y
Normal
Signal?
N
Check RF Cable
Connection
1. Reconnection
2. Install Booster
N
Normal
Picture?
Y
Close
Copyright ⓒ 2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Error
symptom
Picture broken/ Freezing
. By using Digital signal level meter
. By using Diagnostics menu on OSD
( Setting→ Set up→ Manual Tuning → Check the Signal )
- Signal strength (Normal : over 50%)
- Signal Quality (Normal: over 50%)
Check whether other equipments have problem or not.
(By connecting RF Cable at other equipment)
→ DVD Player ,Set-Top-Box, Different maker TV etc`
Normal
Picture?
N
Contact with signal distributor
or broadcaster (Cable or Air)
A. Video error
☞ A7
Y
Check SVC
S/W Version
Bulletin?
S/W Upgrade
Normal
Picture?
Y
Close
36
Established
2012.01.16
date
Revised date
N
Check
Tuner soldering
Y
N
Replace
Main B/D
2012.03.21
Y
Close
N
LGE Internal Use Only